I. Understanding the Basics
* Light is Key: Portrait photography is all about light. A single flash gives you the power to control the light, create shadows, and sculpt your subject's face.
* Quality of Light: Think about the light source characteristics such as size and direction, and the shadow it casts.
* Inverse Square Law: Understand that the intensity of light decreases rapidly as you move further away from the flash. This means small changes in flash distance can have a significant impact on the look of your light.
* Power vs. Distance: You can achieve similar results by varying the distance of the flash from your subject or changing the power setting on the flash. Experiment to find what looks best.
II. Essential Equipment
* Speedlight (External Flash): A hot-shoe mounted flash is ideal. Look for one with manual power control (crucial for precise adjustments) and TTL (Through-The-Lens) metering (for quick starting points, though we'll mostly use manual). Many modern flashes also have high-speed sync (HSS), which can be helpful in certain situations.
* Light Stand: A sturdy light stand is essential for positioning your flash.
* Flash Trigger (Transmitter/Receiver): To fire the flash off-camera without being connected directly to the camera's hot shoe. Look for wireless triggers compatible with your camera and flash. Godox, Yongnuo, and Profoto are popular brands.
* Light Modifier (Umbrella, Softbox, etc.): This is *very* important. A bare flash creates harsh, unflattering light. A modifier diffuses the light, making it softer and more flattering.
* Optional: Reflector: A reflector can bounce light back into the shadows, filling them in and creating a more balanced look. White, silver, and gold reflectors offer different effects.
* Camera: Any DSLR or mirrorless camera with manual mode controls is fine.
* Lens: A portrait lens in the 50mm to 85mm range (or equivalent on your camera system) is usually a good starting point.
III. Basic Lighting Setups & Techniques
Here are several popular single-light setups, ranging from simple to slightly more advanced:
* A. On-Camera Flash (Bounced):
* How to: Point your flash towards the ceiling or a nearby wall. The light bounces off the surface, creating a larger, softer light source.
* Pros: Simple, quick, portable. Good for documentary or event-style portraits when you need to move fast.
* Cons: Can be flat if the ceiling is too high or dark. Color casts from colored walls. No shadows to create dimension.
* Tips: Use a white or neutral-colored surface for the bounce. Adjust flash power to control brightness. Tilting the head of the flash is important.
* B. Off-Camera Flash with Umbrella (Shoot-Through or Reflective):
* How to: Place your flash on a light stand and attach an umbrella. *Shoot-through* umbrellas diffuse light as it passes through the translucent material. *Reflective* umbrellas bounce the light back toward the subject. Position the umbrella to the side and slightly in front of your subject.
* Pros: Relatively inexpensive, produces soft, flattering light. Easy to set up.
* Cons: Can be bulky to transport. Spill light is hard to control.
* Tips: Angle the umbrella to control the direction of the light and shadows. Experiment with the distance of the flash from the umbrella to adjust the softness.
* C. Off-Camera Flash with Softbox:
* How to: Place your flash on a light stand and attach a softbox. A softbox contains the light and provides a more controlled, softer light source than an umbrella. Position the softbox to the side and slightly in front of your subject.
* Pros: Creates beautiful, soft light. More control over light spill than an umbrella.
* Cons: More expensive and bulkier than an umbrella.
* Tips: Softboxes come in various shapes and sizes. Larger softboxes create softer light. Experiment with the distance of the softbox from your subject.
* D. Rembrandt Lighting:
* How to: Position the light to the side and slightly behind your subject, so that a small triangle of light appears on the cheek furthest from the light source.
* Pros: Dramatic, adds depth and dimension to the face.
* Cons: Can be tricky to get the angle just right.
* Tips: Pay close attention to the size and shape of the triangle of light. Small adjustments in the light's position can make a big difference.
* E. Short Lighting:
* How to: Place the light so that it illuminates the side of the face that is *turned away* from the camera. This creates a shadow on the side of the face closest to the camera, making the face appear slimmer.
* Pros: Slimming effect, creates a sense of depth.
* Cons: May not be flattering for all face shapes.
* Tips: Carefully observe the shadows and highlights on the face to achieve the desired effect.
* F. Broad Lighting:
* How to: Position the light so that it illuminates the side of the face that is *facing* the camera.
* Pros: Makes the face appear wider.
* Cons: Can accentuate roundness in the face.
* Tips: Generally avoid this lighting pattern unless you're specifically trying to achieve this effect.
* G. Using a Reflector (with any of the above):
* How to: Position a reflector opposite your flash. The reflector will bounce light back into the shadows, filling them in and creating a more balanced exposure.
* Pros: Simple, inexpensive way to add fill light.
* Cons: Requires an assistant (or a stand) to hold the reflector.
* Tips: Experiment with different reflector surfaces (white, silver, gold) to achieve different effects.
IV. Camera Settings
* Manual Mode (M): Essential for controlling the exposure and white balance.
* ISO: Keep the ISO as low as possible (ISO 100 or 200) to minimize noise.
* Aperture (f-stop): Aperture controls depth of field. For portraits, f/2.8 to f/5.6 is a good starting point. Wider apertures (smaller f-number) create shallower depth of field, blurring the background.
* Shutter Speed: Your shutter speed will generally be dictated by your flash sync speed (usually 1/200th or 1/250th of a second). You must be at or below your camera's flash sync speed for the flash to function properly. Higher speeds require HSS. The shutter speed controls how much ambient light is in the photo.
* White Balance: Set your white balance to "Flash" or "Custom" for accurate colors.
V. Flash Settings
* Manual Mode (M): Control the flash power directly. Start with a low power setting (e.g., 1/16 or 1/32) and gradually increase it until you achieve the desired exposure.
* TTL (Through-The-Lens): Can be used as a starting point, but ultimately, manual control gives you more consistent results. TTL meters the scene and adjusts flash power automatically. Set the flash to TTL, take a test shot, and then switch to manual mode and adjust the power based on the TTL reading.
* Flash Compensation: If using TTL, you can use flash compensation to fine-tune the flash power.
VI. Workflow
1. Set up your equipment: Place your light stand, attach your flash and modifier, and connect your flash trigger.
2. Position your subject: Choose a background that complements your subject.
3. Start with a low flash power: Take a test shot to evaluate the lighting.
4. Adjust flash power and position: Fine-tune the flash power and position to achieve the desired lighting pattern and exposure.
5. Pay attention to the catchlights: Catchlights are the reflections of the light source in your subject's eyes. They add life and sparkle to the portrait. Position the light so that the catchlights are in a pleasing location in the eyes.
6. Use a reflector (if needed): If the shadows are too deep, use a reflector to bounce light back into the shadows.
7. Take your time: Don't rush. Experiment with different lighting positions and camera settings to find what works best.
8. Communicate with your subject: Help your subject relax and feel comfortable. Give them clear instructions.
9. Chimping: Check your LCD after each shot (but don't overdo it). Adjust your settings as needed.
VII. Tips & Tricks
* Practice: Experiment with different lighting setups and camera settings to develop your own style.
* Start Simple: Don't try to do too much at once. Focus on mastering the basics first.
* Watch Tutorials: There are countless online tutorials that can teach you different portrait lighting techniques.
* Learn from the Masters: Study the work of famous portrait photographers to learn how they use light.
* Distance is Key: Changing the distance between your light and the subject changes the quality of the light. Closer = softer, further = harder.
* Feathering the Light: Instead of aiming the light directly at the subject, try "feathering" it – pointing the center of the light *slightly* away from the subject. This can create a softer, more flattering light.
* Backgrounds Matter: Choose a background that is not distracting and complements your subject. Consider using a seamless paper background or a simple wall. The background should also be further from the subject so it can be more easily blurred with a wide aperture.
* Post-Processing: Post-processing is an important part of portrait photography. Use software like Adobe Lightroom or Photoshop to adjust the exposure, contrast, color, and sharpness of your images.
VIII. Common Mistakes to Avoid
* Harsh Light: Using a bare flash without a modifier is the most common mistake.
* Blowing out Highlights: Overexposing the image. Check your histogram and adjust your settings accordingly.
* Ignoring the Background: A distracting background can ruin a good portrait.
* Not Communicating with Your Subject: Help your subject relax and feel comfortable.
* Not Experimenting: Don't be afraid to try new things.
By following these tips, you can create beautiful, professional-looking portraits with just one flash. Remember to practice, experiment, and have fun! Good luck!